1.2312
Data verified1.2312 is the sulfur-added, free-machining version of 1.2311. The added sulfur dramatically improves machinability, at the cost of polishability and weldability — the standard choice for mold bases and non-cavity parts.
Chemical composition
| Element | Content (%) |
|---|---|
| C | 0.35–0.45 |
| Si | 0.20–0.40 |
| Mn | 1.40–1.60 |
| S | 0.05–0.10 |
| Cr | 1.80–2.00 |
| Mo | 0.15–0.25 |
Weight percent, per the governing standard ranges. Actual values per heat are on the mill certificate.
Properties
| Delivery condition | Prehardened |
| Hardness | 280–325 HB |
| Tensile strength | 950–1100 MPa |
| Density | 7.85 g/cm³ |
Heat treatment
Supplied prehardened; not intended for further hardening or polishing-critical surfaces.
Equivalent grades
| Standard | Designation |
|---|---|
| din | 1.2312 |
| aisi | P20+S |
| gb | 3Cr2MoS |
Compare side by side: 1.2312 vs 1.2311 · 1.2312 vs P20
Equivalents overlap in chemistry and use but are not always identical — see our equivalents guide before substituting in certified designs.
Applications & Processing
Applications: Mold bases, holder blocks, ejector plates, hot-runner manifolds, non-polished mold components.
Processing: Excellent machinability. Not recommended where a mirror polish or extensive weld repair is expected.
FAQ
- Why does 1.2312 contain sulfur?
- Sulfur (0.05–0.10%) forms manganese sulfides that break chips and cut machining time. The trade-off is lower polishability and toughness across the grain.
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Ask for a quotationVisit NasteelSource: DIN / EN published grade ranges · Last updated 2026-11-03. Data is indicative — verify critical values against the governing standard and mill certificate before use.